* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

ul, ol {
    list-style: none
}

a {
    text-decoration: none
}

.content {
    width: 1000px;
    margin: 0 auto;
}

footer {
    height: 200px;
    background: url("../image/ext2.bmp") repeat-x 0 0;
}

footer > div {
    background: url("../image/footer.jpg") no-repeat center;
    height: 200px;
}